饮用水中卤乙酸的氧化分解研究

本文考察了O3、UV、O3／UV、O3／H2O2、H2O2／UV及O3／H2O2／UV等各种氧化技术对水中卤乙酸的氧化去除情况,发现作为高级氧化技术的O3／UV、O3／H2O2：、H2O2／UV及O3／H2O2／UV均对卤乙酸有明显的去除效果,其中O3/UV和O3／H2O2／UV的氧化速率高于其他高级氧化工艺。二氯乙酸（DCAA）的分解速率明显高于三氯乙酸（TCAA）。对O3／UV进行的动力学研究,发现反应服从准一级反应动力学模式,在相同的初始溶解臭氧浓度下,DCAA的南,值为TCAA的4～5倍。     

臭氧生物活性炭技术在低温低浊水处理中的应用

根据寒冷地区低温低浊水的特点,考察了国内外应用臭氧生物活性炭技术处理低温低浊水的效果。通过臭氧生物活性炭对天然有机物、消毒副产物、氨氮、金属离子等去除的机理探求和效能的评价,得出臭氧生物活性炭是一种适合处理寒冷地区低温低浊水的安全饮用水保障技术。     

均相催化臭氧化反应的研究进展

综述了近年来水溶液和有机溶剂中均相催化臭氧化降解水中有机物的研究进展。介绍了水溶液中不同的有机污染物均相催化臭氧化过程中,各种催化剂的应用,它们的活性和影响催化体系效率的参数,及其催化氧化反应的机理。有机溶剂中的催化臭氧化具有更高的氧化效率和臭氧利用率,是一种可能的水处理的新方法。     

《蒙特利尔议定书》缔约方第19次会议第XIX/6号决定及相关决议的解读与述评

对《蒙特利尔议定书》缔约方第19次会议关于加速逐步淘汰氢氯氟烃(HCFC)的第XIX/6号决定及相关的第XIX/8号与第XIX/20号决定,作了全面、完整、详细的介绍与解读;针对目前行业对加速逐步淘汰HCFC所关心的问题、有争议的问题、有困惑的问题,就作者的认识作了述评。     

Degradation of diphenyl chlorophosphate by using ozone

Diphenyl chlorophosphate （DPCP）, which acts as a simulant of nerve warfare agent, is decontaminated by ozone in this study. Experimental results show that DPCP can be degraded rapidly by ozone. In the optimum working conditions, 99% 50 mg/L DPCP are degraded in 16min, and 30% total organic carbon of the solution is reduced. The free radical accelerant, Fe2＋, and inhibitors, 2-propanol and tert-butanol significantly influence the degradation efficiency of DPCP, therefore, free radical is the most important oxidant for the DPCP degradation reaction in this system. Ozone can be decomposed to hydroxyl radical, which would attack DPCP to start the degradation reaction. Furthermore, parts of DPCP would be mineralized, and degradation of toluene probably is the controlling step of the mineralization of DPCP. Finally, the reaction pathways are predicted for the degradation of DPCP by ozone.     

Chromia Coating on Iron Formed from CrO3 in Ozone

Ozone gas was blown over Cr₂O₃ powder painted on an iron substrate. About one half the Cr₂O₃ transformed to CrO₃ at 473 K. Subsequently, the liquid CrO₃ was decomposed thermally at 723 K to Cr₂O₃ which adhered to the substrate. The dense layer had the corundum structure of (Cr,Fe)₂O₃ which formed at the Cr₂O₃/substrate interface. Without the ozone-gas treatment, the layer was porous, and a thick spinel phase (Cr,Fe)₃O₄ formed; it was not effective for oxidation resistance. The ozone treatment enhanced the oxidation resistance below 1000 K.     

臭氧杀菌在工业循环冷却水中的应用

文章介绍了用臭氧法进行工业循环冷却水杀菌灭藻的试验情况，证明杀菌率可达９９％以上。     

Optimum choice of local network parameters for broadband ozone and aerosol measurements

Questions are considered for the optimum construction of local terrestrial networks for atmospheric measurements. Procedures and network optimization criteria are suggested that are intended for measuring the overall ozone and atmospheric aerosol content. __________ Translated from Izmeritel’naya Tekhnika, No. 10, pp. 32–35, October, 2007.     

Mineralization improvement of phenol aqueous solutions through heterogeneous catalytic ozonation

To assess the mineralization level achieved, aqueous solutions of phenol have been treated with ozone in the presence of different solid catalysts. Activated carbon was the principal catalyst investigated, although some additional experiments were carried out by utilizing metal oxide‐based catalysts (ie Ti, Co and Fe) supported onto alumina. Usage of Co/Al₂O₃ led to the highest values of phenol byproduct mineralization, nevertheless some metal leaching was experienced in the process. The operating variables studied when using activated carbon as the catalyst were ozone gas concentration, amount of catalyst added and temperature. Regardless of the catalyst type used, two different ozonation kinetic regimes were observed: (I) an initial period, corresponding to the presence of phenol in solution, characterized by small amounts of dissolved ozone and no improvement of the mineralization degree if comparing catalytic and non‐catalytic runs; (II) a second period, free of phenol, in which dissolved ozone accumulated in water and the beneficial effects of catalysts on mineralization were noticed. Experimental data also demonstrated the improvement in oxalic acid elimination in the presence of heterogeneous catalysts. Finally, consumption of ozone per mass of carbon removed, reaction factors and Hatta numbers were also calculated. Copyright © 2003 Society of Chemical Industry     

烧结圆盘配料皮带秤控制新思路

通过分析烧结配料主要设备——圆盘配料皮带秤的工艺状况，找出了通常采用的控制方案的薄弱环节。提出了以累计料量控制为主，瞬时料流量控制为辅的控制思路。实践证明，该思路有助于提高累计料流量控制精度及料流量的稳定性。